Typhoon Irma (1974)

Basin

Western Pacific

Dates

November 20, 1974 to December 3, 1974

Peak strength

Category 4, 115 kt (132 mph)

Lowest pressure

940 mb (27.76 inHg)

Landfall

Yes

Accumulated cyclone energy

24.1

Identifier

WP331974

No source this site reads publishes a machine-readable casualty or damage figure for a storm of this era. The National Hurricane Center’s season tables begin in 1995 and carry deaths and damage only from 2005 in the Atlantic and 2020 in both basins; the US Storm Events record begins in 1996.

• Tropical Storm WandaWestern Pacific · 1974Tropical Storm55 kt · 992 mb
• Tropical Storm AmyWestern Pacific · 1974Tropical Storm55 kt · 988 mb
• Tropical Storm BabeWestern Pacific · 1974Tropical Storm60 kt · 985 mb
• Typhoon CarlaWestern Pacific · 1974Cat 180 kt · 965 mb
• Typhoon DinahWestern Pacific · 1974Cat 170 kt · 965 mb
• Unnamed tropical depressionWestern Pacific · 1974Tropical Depression30 kt
• Tropical Storm EmmaWestern Pacific · 1974Tropical Storm60 kt · 990 mb
• Tropical Storm FredaWestern Pacific · 1974Tropical Storm45 kt · 990 mb
• Typhoon GildaWestern Pacific · 1974 · 145 deathsCat 290 kt · 945 mb
• Unnamed tropical depressionWestern Pacific · 1974Tropical Depression
• Tropical Storm HarrietWestern Pacific · 1974Tropical Storm45 kt · 996 mb
• Tropical Storm JeanWestern Pacific · 1974Tropical Storm45 kt · 994 mb
• Typhoon IvyWestern Pacific · 1974Cat 295 kt · 950 mb
• Typhoon KimWestern Pacific · 1974Cat 165 kt · 990 mb
• Tropical Storm LucyWestern Pacific · 1974Tropical Storm35 kt · 994 mb
• Unnamed tropical depressionWestern Pacific · 1974Tropical Depression
• Unnamed tropical depressionWestern Pacific · 1974Tropical Depression
• Typhoon MaryWestern Pacific · 1974Cat 170 kt · 965 mb
• Tropical Depression MaryWestern Pacific · 1974Tropical Depression994 mb
• Unnamed tropical depressionWestern Pacific · 1974Tropical Depression
• Unnamed tropical depressionWestern Pacific · 1974Tropical Depression30 kt
• Tropical Storm NadineWestern Pacific · 1974Tropical Storm50 kt · 980 mb
• Unnamed tropical depressionWestern Pacific · 1974Tropical Depression
• Tropical Depression MaryWestern Pacific · 1974Tropical Depression994 mb
• Typhoon PollyWestern Pacific · 1974Cat 295 kt · 950 mb
• Tropical Storm RoseWestern Pacific · 1974Tropical Storm50 kt · 985 mb
• Unnamed tropical depressionWestern Pacific · 1974Tropical Depression30 kt
• Typhoon ShirleyWestern Pacific · 1974Cat 175 kt · 970 mb
• Tropical Storm TrixWestern Pacific · 1974Tropical Storm40 kt · 990 mb
• Typhoon VirginiaWestern Pacific · 1974Cat 175 kt · 970 mb
• Unnamed tropical depressionWestern Pacific · 1974Tropical Depression
• Tropical Storm WendyWestern Pacific · 1974Tropical Storm60 kt · 985 mb
• Typhoon AgnesWestern Pacific · 1974Cat 3105 kt · 960 mb
• Typhoon BessWestern Pacific · 1974Cat 165 kt · 975 mb
• Typhoon CarmenWestern Pacific · 1974Cat 175 kt · 975 mb
• Typhoon DellaWestern Pacific · 1974Cat 290 kt · 960 mb
• Typhoon ElaineWestern Pacific · 1974Cat 295 kt · 940 mb
• Tropical Storm FayeWestern Pacific · 1974Tropical Storm55 kt · 985 mb
• Typhoon GloriaWestern Pacific · 1974Cat 4120 kt · 930 mb
• Tropical Storm HesterWestern Pacific · 1974Tropical Storm35 kt · 1000 mb
• Tropical Storm JudyWestern Pacific · 1974Tropical Storm40 kt · 1000 mb
• Tropical Storm KitWestern Pacific · 1974Tropical Storm40 kt · 996 mb

A best track is the record a warning agency settles on after the storm, not what it said at the time: position, maximum sustained wind and central pressure every six hours, revised against every observation that came in later. Category is the Saffir-Simpson scale, which runs from Category 1 at 64 kt to Category 5 at 137 kt and reads wind only, so it says nothing about surge or rain. Accumulated cyclone energy adds up the square of the wind through the storm's life, so it counts strength and duration together.

Storm history from NOAA NCEI’s International Best Track Archive for Climate Stewardship (IBTrACS), which merges the official best track of every warning agency. Live storms, cones, watches and warnings from the National Hurricane Center and the Central Pacific Hurricane Center. Archived radar from NOAA’s Level II archive.